Abstract:
The International Organization for Standardization (ISO) approved the method suggested by Iran for categorizing and classifying nanomaterials and published it in the form of an international standard.

Iran Nanotechnology Standardization Committee (ISIRI/TC229) had proposed a method entitled 'Nanotechnology Tree' for the categorization of various types of nanomaterials and nanostructures to the International Nanotechnology Standardization Committee (ISO/TC229). After studying the proposal at various stages, the 32 member countries of the committee approved the publication of the standard.

The standard, entitled "Methodology of Categorization and Classification of Nanomaterials" presents a methodology and a systematic method in order to categorize and classify nanomaterials according to their size, chemical nature, properties, and characteristics.

Nanomaterials can be easily classified by this method according to their properties and characteristics, and they can be placed in similar groups in a branch of the tree. As a result, similar standards can be devised for nanomaterials with similar properties.

Nanotechnology Trees have been used in Iran for several years in order to classify nanomaterials.

The extent and the rapid development of nanotechnology will result in a wide range of nanomaterials to be produced by this technology in the future. Therefore, studying and compilation of standards both in the field of measurement and properties determination and in the field of safety and security will be very difficult without categorizing or classifying nanomaterials.

The fourth standard was published by ISO/TC229. Having had an active participation in the meetings of the committee, Iran has played an important role in the compilation of these standards.